Hey guys, Just finished this yesterday. I started with a $1 home depot flashlight and followed maddogs video and came up with this sweet piece. I used a 510 connector, 3mm color changing led, and a low tact switch. The button is perfect, it fits flush to the body of the flashlight but the hole it ists in is just big enough that you can click it with a little pressure. I put a 18650 in it and am looking at modding the tailcap to accept 2 3v cr2s for 6v vaping. As it sits now, it works perfectly, and 2400mah aint too shabby either. Let me know what ya think!